Machine for making paper shells.



PATENTED MAR. 31, 1908.

w'm No. 883,169.

J. CHESNBY. MACHINE FOR MAKING PAPER SHELLS.

APPLICATION FILED DEC. 11. 1906.

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INVENTOR wlrlvsssss:

ATTORNEYS} UNITED STATES PATENT OFFICE.

JOHN CHESNEY, OF PAULSBORO, NEW JERSEY, ASSIGNOR TO THE E. I. DU PONT DENEMOURS POWDER COMPANY, OF WILMINGTON, DELAWARE, A CORPORATION OF NEWJERSEY.

MACHINE FOR MAKING PAPER SICELLS.

Specification of Letters Patent.

Patented March 31, 1908.

Application filed December 11, 1906. Serial No. 347 ,381.

To all whom it may concern:

Be it known that 1, JOHN CHESNEY, a citizen of the United States,residing at Paulsboro, county of Gloucester, and State of New Jersey,have invented a new and useful Improvement in Machines for Making PaperShells, of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, which form a part ofthis specification.

My invention relates to that type of machine in which sheets of paperare conveyed to a mandrel, wound thereon in tube form, and the projectinend of the tube crimped and folded in to close the end and complete theshell.

The object of my invention is to more certainly and securely fold theend of the tube than heretofore, and my invention consists in a new andsimple attachment for this purose.

In the drawings: Figure 1 is a plan view of my new folding mechanism;Fig. 2 is a side elevation of the same, the top plate of the machine andthe cam shaft being shown in section; Fig. 3 is a detail view of thefolder blades in their closed positions; Fig. 4 is a section on the line44 of Fig. 3 with the header added.

10 is a part of the frame of the machine to which are secured the plate20 that supports the folders 30 and 40, the post'51 that supports thetable 50, and the bracket 61 that supports one end of the cam-shaft 60.

The folder 30 has the ins 31 engaging slots 21 in the plate 20, thisconnection permitting the folder to slide longitudinally of the plate.The folder 40 has the pins 41 engaging slots 22 in the plate 20. At theend of folder 30 is an abutment 33 ada ted to be enga ed by a cam 63 onthe cam-s aft. Se-

cure to one of the pins 41 of the folder 40 is a bar 43 whose rear endslides in a guide in the bracket 45. The bar 43 has an abutment 44adapted to be engaged by a cam 64, on the cam shaft. The abutments 33and 44 are on opposite sides of the cam-shaft and are adapted to besimultaneously pushed away from the shaft by the cams 63 and 64, therebycausing the folders to simultaneously advance to perform the foldingoperation. When the cams 63 and 64 are retracted from the abutments, thespring 65, secured at its opposite ends to lugs 36 and 46 on the foldersrespectively, retract the folders, and bring both abutments 33 and 44toward the camshaft in position to be again operated by the cams 63 and64.

The folder 30 is bifurcated at its outer end to form the two blades 35,35. The outer ends of the blades 3535 are cut away to form a mouth whosebase is substantially on a level with the axis of the mandrel 70.

The folder 40 is provided with a central blade 45 adapted, in thefolding operation, to extend between the blades, 35, 35 of the folder30. The outer end of the blade 45 is cut away, similarly to the outerends of blades 35, 35, to form a mouth whose base also is substantiallyon a level with the axis of the mandrel 70.

The outer edge of that part of the folder 30 between the blades 35, 35,is cut away on a line substantially parallel with the outer edge of theblade 45. The outer edge of that part of the folder 40 on both sides ofthe lade 45 is cut away on a line substantially parallel with the outered es of the blades 35, 35. Thus, when the fo ders are brought to ether,the blades 45 of folder 4O substantially fits within and fills the spacebetween the blades 35 and 35 of folder 30, and the blades 35 and 35 offolder 30 substantially inclose the blade45 of folder 4'0.

The mandrel 70 is continuously rotating, and as the folders advance, theedge of the tube overhanging the mandrel is caught between blades 35,45, 35, and twisted and folded in toward the axis of the mandrel to formthe closed end of the shell. The folders continue to move toward eachother until the deepest part of the mouths nearly, but not uite overlap,the extreme twisted end 72 o the pa er projecting into or through thespace sti left at this point (see Figs. 3 and 4.)

The final operation, which does not differ from that heretofore known,consists in forcing the central twisted part into the recess 71 in theend of the mandrel, thereby setting the folds ermanently. This operationis performed by a header 80 mounted on a lever 81 pivoted on the machineframe, the lever being actuated, at the proper time, by a plun er 82 ina cylinder 83. A spring 84, secure to the header and to a projection 85on the frame, returns the header to its inactive position.

The upper end of the blade 45 consists of a separate piece 49 detachablysecured to the a J ecting body of the folder thereby enabling a longeror shorter piece to be substituted, so that, when different sizedmandrels are employed to form differentsized shells, the top of theplate 45 may always be brought on a level with, and will not projectabove, the top of the mandrel.

Havin now fully described my invention, what I c aim and desire toprotect by Letters Patent is:

1. In a machine for making paper shells, the combination With therotatable mandrel, of two reciprocating folders ada ted to move towardeach other in front of t e mandrel, one folder having two forwardlyproblades spaced apart and cut away to form a mouth, the other folderhaving a for- Wardly projecting blade also cut away to form a mouth andadapted when advanced to enter between the blades of the other folder,the front edge of the first folder between its blades being cut away tosubstantially conform to the front edge of the blade of the secondfolder, and the front edges of the second folder on opposite sides ofits blade being cut away to substantially conform to the front edges ofthe blades of the first folder, and means to advance and retract thefolders.

2. In a machine for making aper shells, the combination with the rotatale mandrel, of a guide plate, folders slidable toward and from eachother on said plate, an abutment on one folder, a second abutment, a barcon necting the second folder with the second abutment, a shaftextending between the abutments, and cams on the shaft ada ted to engagethe said abutments respective y.

In testimony of which invention, I have hereunto set my hand; atPaulsboro, N. J., on this 26th day of November, 1906.

JOHN CHESNEY.

Witnesses:

ERNEST REDFIELD, THOS. W. BACCHUS.

